may riff
Verbe régulier : riff - riffed- riffed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I may riff
you may riff
he may riff
we may riff
you may riff
they may riff 	I may be riffing
you may be riffing
he may be riffing
we may be riffing
you may be riffing
they may be riffing	I may have riffed
you may have riffed
he may have riffed
we may have riffed
you may have riffed
they may have riffed	I may have been riffing
you may have been riffing
he may have been riffing
we may have been riffing
you may have been riffing
they may have been riffing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I may not riff
you may not riff
he may not riff
we may not riff
you may not riff
they may not riff 	I may not be riffing
you may not be riffing
he may not be riffing
we may not be riffing
you may not be riffing
they may not be riffing	I may not have riffed
you may not have riffed
he may not have riffed
we may not have riffed
you may not have riffed
they may not have riffed	I may not have been riffing
you may not have been riffing
he may not have been riffing
we may not have been riffing
you may not have been riffing
they may not have been riffing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
may I riff?
may you riff?
may he riff?
may we riff?
may you riff?
may they riff? 	may I be riffing?
may you be riffing?
may he be riffing?
may we be riffing?
may you be riffing?
may they be riffing? 	may I have riffed?
may you have riffed?
may he have riffed?
may we have riffed?
may you have riffed?
may they have riffed? 	may I have been riffing?
may you have been riffing?
may he have been riffing?
may we have been riffing?
may you have been riffing?
may they have been riffing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
may I not riff?
may you not riff?
may he not riff?
may we not riff?
may you not riff?
may they not riff? 	may I not be riffing?
may you not be riffing?
may he not be riffing?
may we not be riffing?
may you not be riffing?
may they not be riffing? 	may I not have riffed?
may you not have riffed?
may he not have riffed?
may we not have riffed?
may you not have riffed?
may they not have riffed? 	may I not have been riffing?
may you not have been riffing?
may he not have been riffing?
may we not have been riffing?
may you not have been riffing?
may they not have been riffing?